For Loop In C

For Loop In C How To Best Implement For Loop In C? 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How To Implement Static Variable In C? How To Implement Queue in C? How To Implement Circular Queue in C? What is Embedded C programming and how is it different? How To Best Implement For Loop In C? Published on Sep 10,2019 521 Views edureka Bookmark In this article on For Loop in C we will explore everything about For loops right from the basic syntax to different ways implementing it. Following pointers will be covered in this article,For Loop in CLoops in CFor Loop SyntaxDifferent Forms of For Loop In CNested for loop in CJumping Out of LoopsSo let us get started then,For Loop in CLoop is one of the fundamental concepts in all programming languages as it simplifies complex problems. In simple words, loop repeats the same set of code multiple times until the given condition returns false. So, instead of writing the same code again again, we can use loop to execute the same code multiple times.For e xample, to print natural numbers from 1 to 100, either you can write 100 print statements, or you can run loop for 100 iterations and print the natural numbers. Obviously the second option is easier more feasible.Moving on with this For Loop In C article,Loops in CLoop consists of two parts:Body of Loop: consists of a set of statements that need to be continuously executedConditional Statement: is a condition. If it is true, then the next iteration is executed else the execution flow exits the loop.Types of Loop in CThere are two types of loops in C i.e. entry-controlled loops exit controlled loops.Entry-controlled loops: Entry controlled loops are those loops where the test condition is tested before executing the body of a loop. For While loop are entry-controlled loops.Exit controlled loops: Exit controlled loops are those loops where the test condition is tested after executing the body of a loop. do-while loop is an exit-controlled loop.Moving on with this For Loop In C arti cle,For Loop SyntaxFor Loop is a looping structure that is used to execute a sequence of code until the given condition returns false. The best condition to use for loop is when the number of iterations is known in advance.Syntax:for(initialization; condition test; increment or decrement) { //block of code to be executed repeatedly }Flow Diagram of For LoopStep 1: In the execution flow, first the counter variable gets initialized.Step 2: The test condition is verified, where the counter variable is tested for a given condition. If condition returns true then the block of code residing inside the function body gets executed, else the for loop gets terminated control comes out of the loop.Step 3: In case of successful execution of the function body, the counter variable gets incremented or decremented based on the operation.Example#include stdio.h int main() { int counter; for (counter =1; counter=10; counter++) { printf(%dn, counter); } return 0; }Output:Moving on with this For Loop In C article,Different Forms of For Loop In CCounter++ counter+1 yields the same output.Example:#include stdio.h int main() { int counter; for (counter =1; counter=10; counter=counter+1) { printf(%dn, counter); } return 0; }Output:You can skip the initialization of the counter variable it can be declared before the loop.Example:#include stdio.h int main() { int counter=1; for(; counter=10; counter=counter+1) { printf(%dn, counter); } return 0; }Output:You can skip the initialization of the counter variable, but the semicolon before the test condition should be present, otherwise it will throw compilation error.You can also skip the incrementing or decrementing of the counter. But in this scenario the counter should be incremented inside the for-loop body.Example:#include stdio.h int main() { int counter; for (counter=1; counter=10;) { printf(%dn, counter); counter=counter+1 } return 0; }Moving on with this For Loop In C article,You can skip the condition in the for loop, which will result in an infinite loop.Example:#include stdio.h int main() { int counter; for (counter=1; ; counter++) { printf(%dn, counter); } return 0; }Output:Infinte LoopWe can initialize more than one variable in for loop.Example:#include stdio.h int main() { int x, y, z; for (x=1, y=2, z=3; x5 ; x++, y++, z++) { printf(x %dn, x); printf(y %dn, y); printf(z %dn, z); } return 0; }Output:Moving on with this For Loop In C article,Nested for loop in CYou can put one for loop inside another for loop in C. This is called nested for loop.Example:#include stdio.h #include stdlib.h int main() { int i, k, rows, blank; printf(Enter the number of rows:); scanf(%d,rows); blank = rows; for ( i = 1 ; i = rows ; i++ ) { for ( k = 1 ; k blank ; k++ ) printf( ); blank--; for ( k = 1 ; k = 2*i - 1 ; k++ ) printf(*); printf(n); } return 0; }Example:Moving on with this For Loop In C article,Jumping Out of LoopsIn various scenarios, you need to either exit the loop or skip an iteration of loop when certain condition is met. So, in those scenarios are known as jumping out of the loop. There are two ways in which you can achieve the same.break statementWhen break statement is encountered inside a loop, the loop is immediately exited and the program continues with the statement immediately following the loop.In case of nested loop, if the break statement is encountered in the inner loop then inner loop is exited.Example:#include stdio.h int main() { int counter; for (counter=1; counter=10; counter++) { if(counter==5) { break; } printf(%dn, counter); } return 0; }Output:Continue statementContinue Statement sends the control directly to the test-condition and then continue the loop process.On encountering continue keyword, execution flow leaves the current iteration of loop, and starts with the next iteration.Example:#include stdio.h int main() { int counter; for (counter =1; counter=10; counter++) { if(counter%2==1) { continue; } printf(%dn, counter); } return 0; }Output:With this we come to the end of this blog on For Loop In C. I hope you found this informative and helpful, stay tuned for more tutorials on similar topics.You may also checkout our training program to get in-depth knowledge on jQuery along with its various applications, you canenroll herefor live online training with 24/7 support and lifetime access.Implement the above code with different strings and modifications. Now, we have a good understanding of all key concepts related to the pointer.Got a question for us? Mention them in the comments section of this blog and we will get back to you.Recommended blogs for you Edureka Success Story â€" Balas Plan to Become the Most Skilled IT Professional Read Article International Students Day: Inspirational Edureka Learners Stories Read Article What is Interface Testing and why do we need it? Read Article Infographics: How Big is Big Data? 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